Juhani Aataminpoika, a Finnish serial killer also known as "Kerpeikkari" ("The Executioner"), was one of the most active serial killers of the 19th century, killing as many as 12 people in 1849 within five …

Most experts define a serial killer as someone who has murdered at least three people, over a period of more than a month, with at least some “cooling-off” time between each murder.

Nov 23, 2025 · In the 20th century the subject of serial murder inspired countless popular novels, becoming a virtual subgenre of crime literature by the 1980s. Films about serial killers became …

The elapsed time between murders separates serial killers from other multiple killers. John Wayne Gacy, a serial murderer, planned the separate killings of 33 boys and young men in Chicago over a span of …

Aug 13, 2025 · Many serial killers experience childhood trauma or early separation from their mothers. As a consequence of that trauma or separation, scientists believe, they learned to suppress empathy …

Nov 21, 2025 · 12 Most Notorious Serial Killers in American History: Ted Bundy, Jeffrey Dahmer and More There’s no shortage of serial killers who have shot to infamy over the course of U.S. history. …

From Jack the Ripper to Jeffrey Dahmer to the Gilgo Beach killer, serial killers have long inspired public fear—and public fascination.